a) Why would a product costing system based on a single, volume-based cost driver tend to overcost high-volume products in comparison to an activity-based costing system?

b)The first Real Life in When should ABC be used? suggests that the adoption of activity-based costing in Australia and New Zealand has not been as high as one might expect. What limitations and other challenges to implementing activity-based costing may be impacting the adoption of activity-based costing